OBJECTIVE Despite the pivotal role that hydroxychloroquine (HCQ) plays in treating SLE, less than 50% of patients take HCQ as prescribed. Measurement of HCQ blood levels can help clinicians distinguish nonadherence, versus lack of efficacy of HCQ. We systematically reviewed publications and performed a meta-analysis to examine the correlation between HCQ levels and 1) nonadherence, and 2) SLEDAI scores, in SLE. METHODS A comprehensive search was performed. We included observational and interventional studies that measured HCQ levels, and assessed adherence or SLEDAI in adults with SLE. Forest plots compared pooled estimates of correlations between HCQ levels and reported nonadherence, or SLEDAI scores. RESULTS Among 604 studies screened, 17 were reviewed. We found 3 times higher odds of reported nonadherence in patients with low HCQ levels (OR 2.95, 95% CI 1.63, 5.35, p less then 0.001). The mean SLEDAI score was 3.14 points higher in group with below threshold HCQ levels on a priori analysis (δ = 3.14, 95% CI -0.05, 6.23, p=0.053), and 1.4 points higher in group with HCQ levels below 500 ng/ml (δ = 1.42, 95% CI 0.07, 2.76, p=0.039). Among 1223 patients, those with HCQ levels ?750 ng/ml had a 58% lower risk of active disease, and their SLEDAI score was 3.2 points lower. CONCLUSION We found a good association between low HCQ levels and reported nonadherence. Our results suggest that HCQ levels ?750 ng/mL might be a potential therapeutic target. © 2020, American College of Rheumatology.The value of a large systemic lupus erythematosus (SLE) inception cohort cannot be overstated. Nevertheless, this study's finding regarding the prevalence of "ANA-negative lupus" is debatable. The topline message from the manuscript is that within the 1,132 patients enrolled in the group, 6.2% were anti-cellular antibody negative. It needs to be emphasized, however, that this subset of patients had been receiving treatment for months prior to enrollment. Antibody status at the time of enrollment is therefore not necessarily reflective of what their antibody status had been when their illness was first identified, and therapy begun. © 2020, American College of Rheumatology.The endosperm-specific transcription factor Opaque2 (O2) acts as a central regulator for endosperm filling, but its functions have not been fully defined. Regular o2 mutants exhibit a non-vitreous phenotype, so we used its vitreous variety Quality Protein Maize to create EMS-mutagenesis mutants for screening o2 enhancers (oen). A mutant (oen1) restored non-vitreousness and produced a large cavity in the seed due to severely depleted endosperm filling. When oen1 was introgressed into inbred W64A with a normal O2 gene, the seeds appeared vitreous but had a shrunken crown. oen1 was determined to encode Shrunken1 (Sh1), a sucrose synthase (SUS, EC 2.4.1.13). Maize contains three SUS-encoding genes (Sh1, Sus1, and Sus2) with Sh1 contributing predominantly to the endosperm. https://www.selleckchem.com/products/filgotinib.html We determined SUS activity and found a major and minor reduction in oen1 and o2, respectively. In o2;oen1-1, SUS activity was further decreased. We found all Sus gene promoters contain at least one O2 binding element that can be specifically recognized and be transactivated by O2. Sus1 and Sus2 promoters had a much stronger O2 transactivation than Sh1, consistent with their transcript reduction in o2 endosperm. Although sus1 and sus2 alone or in combination had no perceptible phenotype, either of them could dramatically enhance seed opacity and cavity in sh1, indicating that transactivation of Sus1 and Sus2 by O2 supplements SUS-mediated endosperm filling in maize. Our findings demonstrate that O2 transcriptionally regulates the metabolic source entry for protein and starch synthesis during endosperm filling. © 2020 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley &amp; Sons Ltd.Rapid analysis of single and scant cell populations is essential in modern diagnostics, yet existing methods are often limited and slow. Herein, we describe an ultra-fast, highly efficient cycling method for the analysis of single cells based on unique linkers for tetrazine (Tz)/trans-cyclooctene (TCO)-mediated quenching. Surprisingly, the quenching reaction rates were more than 3 orders of magnitude faster (t1/2 less then 1?s) than predicted. This allowed multi-cycle staining and immune cell profiling within an hour, leveraging the accelerated kinetics to open new diagnostic possibilities for rapid cellular analyses. © 2020 Wiley-VCH Verlag GmbH &amp; Co. KGaA, Weinheim.One- and two-dimensional coordination polymers composed of a structurally flexible, tetradentate diisopyrazole ligand and copper(I) halides were synthesized as crystalline solids. Complexation with copper(I) chloride or bromide resulted in the formation of infinite coordination chains through connecting each diisopyrazole ligand with two copper(I) ions in a trigonal planar coordination geometry. Contrarily, the combination of a diisopyrazole ligand and copper(I) iodide gave a two-dimensional coordination network comprising Cu4 I4 units with stair-step type geometry and diisopyrazoles that acted as both tetradentate and bidentate bridging ligands. All the coordination polymers exhibited visible photo-emission upon UV irradiation, and the Cu4 I4 complex showed thermochromic behavior. © 2020 Wiley-VCH Verlag GmbH &amp; Co. KGaA, Weinheim.BACKGROUND Ephrin-B2/EphB receptor signaling contributes to persistent pain states such as postinflammatory and neuropathic pain. Visceral hypersensitivity (VHS) is a major mechanism underlying abdominal pain in patients with irritable bowel syndrome (IBS) and inflammatory bowel diseases (IBD) in remission, but the underlying pathophysiology remains unclear. Here, we evaluated the spinal ephrin-B2/EphB pathway in VHS in 2 murine models of VHS, that is, postinflammatory TNBS colitis and maternal separation (MS). METHODS Wild-type (WT) mice and mice lacking ephrin-B2 in Nav 1.8 nociceptive neurons (cKO) were studied. VHS was induced by 1. intracolonic instillation of TNBS or 2. water avoidance stress (WAS) in mice that underwent maternal separation (MS). VHS was assessed by quantifying the visceromotor response (VMRs) during colorectal distention. Colonic tissue and spinal cord were collected for histology, gene, and protein expression evaluation. KEY RESULTS In WT mice, but not cKO mice, TNBS induced VHS at day 14 after instillation, which returned to baseline perception from day 28 onwards.